128332117049 has 4 divisors (see below), whose sum is σ = 133911774336. Its totient is φ = 122752459764.

The previous prime is 128332117013. The next prime is 128332117061. The reversal of 128332117049 is 940711233821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 128332117049 - 2¹⁶ = 128332051513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 128332116997 and 128332117015.

It is not an unprimeable number, because it can be changed into a prime (128332119049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2789828609 + ... + 2789828654.

It is an arithmetic number, because the mean of its divisors is an integer number (33477943584).

Almost surely, 2^128332117049 is an apocalyptic number.

It is an amenable number.

128332117049 is a deficient number, since it is larger than the sum of its proper divisors (5579657287).

128332117049 is an equidigital number, since it uses as much as digits as its factorization.

128332117049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5579657286.

The product of its (nonzero) digits is 72576, while the sum is 41.

The spelling of 128332117049 in words is "one hundred twenty-eight billion, three hundred thirty-two million, one hundred seventeen thousand, forty-nine".